John Gregory Bruce (February 16, 1897 – December 4, 1985) was a judge of the United States Tax Court from 1952 to 1967. Born in Edinburgh, Indiana, Bruce attended schools in Indiana and Pineville, Kentucky, and served in the United States Navy from 1918 to 1921. He received an A.B. from Transylvania University in 1921, followed by an LL.B. (cum laude) from the University of Kentucky in 1924, where he was editor-in-chief of the Kentucky Law Journal. Bruce gained admission to the bar in Kentucky in 1923. He was an attorney for the Fordson Coal Company (a subsidiary of Ford Motor Company) in Pineville, Kentucky and Detroit, Michigan, from 1924 to 1931, and was thereafter in private practice in Pineville until 1934.